How do you know He doesn’t?
Remember, it is not about “this earth and physical existence’ only; it is about this earth and our forming ourselves here for eternal life.
With the liturgical season we are reading a lot of St. Peter’s letters as well as St. Paul, and Acts, and the emphasis is quite distinctly on, along with trying to live with loving our neighbors as ourselves, on ‘setting our hearts on the higher gifts’ and noting that we will face suffering on earth but ‘what can separate us from the love of God?:”
While I haven’t suffered through the kind of horrific disease and hunger that too many people have had to deal with, I have a long-term illness that is sometimes quite painful, and as a younger single mother with choices of my children’s father we had more than a few meals from food pantries to help eke things out. To be honest, I could and should do more to help the poor (as could 99.9% of us reading, I dare say), and I’m not claiming that God deliberately allows suffering for some to build character in others. I don’t know WHY people suffer, but I know that just stewing about it or blaming God and despairing of goodness isn’t the way to go. Assuming that I’m here on the earth to help as much as possible, doing so, and encouraging others to do so, and much prayer and TRUST that God will alleviate suffering, however that comes (gifts from us, or graces from Him and bliss in eternity, or a combination of such and more) to my mind is a way to truly love God AND love my neighbor.